128 PROCEEDINGS OF THE AMERICAN ACADEMY. 



e m , e n = Voltage at rath or ?ith leak (volts). 



e = Base of Napierian logarithms. 



I m , In, I = Currents in hne at sending-end, nth junction, and far end 



(amperes). 

 im, in = Currents in rath and nth leaks (amperes). 

 g = Linear leakance of smooth line (mhos per km.). 

 g' = Conductance of central leak in a T or in a section of artificial 



line (mhos). 

 g" , g u = Conductance of each leak in a II (mhos), 

 ra, n = Total number, and reference number, of section junctions in 



artificial line. 

 a, a' = Receiving instrument magnetic constants. 

 n\ = Number of turns in receiving instrument windings. 

 F = Force, or torque, exerted by receiving electromagnetic instrument 



(dynes, or dyne-perp. cms.). 

 p = Numerical exponent. 

 r, 7 =Load leaks, and semi-leaks (mhos). 



